Reversing starter for motor control panels
The Siemens 3RA6250-0AB30 is a SIRIUS compact reversing starter — a single device that combines a contactor pair and overload relay for forward/reverse motor control in one 90 mm wide package. Rated for continuous operation per IEC 60947-6-2, it mounts on a standard DIN rail via screw and snap-on fastening, with a depth of 165 mm and height of 170 mm.
Breaking capacity and trip class — what they mean for your line
The adjustable Trip Class (CLASS 10 and 20) lets you match the overload curve to the motor start profile: Class 10 for short acceleration times (conveyors, pumps), Class 20 for high-inertia loads (fans, centrifuges) where the start current persists longer.
Coil voltage and environmental endurance
The control coil accepts 24 V AC/DC (50/60 Hz), simplifying wiring in panels with mixed supply — no separate DC power supply needed if the panel runs on 24 VDC. Vibration resistance to 20 m/s² at 5.8–500 Hz and shock resistance of 60 m/s² (6g) for 10 ms means it stays latched on a machine skid or near a press — no nuisance dropout.